When a manipulator requiring an argument is used, the ____ header file must be included as part of the program.
A) istream
B) ostream
C) iostream
D) iomanip

Question

Quizplus · Accepted Answer

The header file iomanip provides various manipulators for output formatting, such as setw, setprecision, and setfill. Therefore, when using a manipulator requiring an argument, the iomanip header file must be included as part of the program. The other header files, istream, ostream, and iostream, provide basic input/output operations and do not include the formatting manipulators provided by iomanip. Manipulators are part of input/output formatting, and the iomanip header file specifically provides tools for input/output formatting manipulation. Therefore, when using a manipulator, the iomanip header file must be included in the program.

When a Manipulator Requiring an Argument Is Used, the ____